According to Auto-News.de, Opel is considering using Cadillac's all-new big sedan, the XTS, as the base for its new flagship car, which would likely carry the name Omega.

WorldCarFans.com speculates that Opel could use GM's 3.6-liter direct-injection V6 that generates 304 horsepower or, possibly, a 2.8-liter turbocharged six-cylinder engine that creates 321 horsepower to power the vehicle. The European automaker could even use a 195-horsepower turbocharged four-cylinder engine in this application – fine, since many of Europe's largest sedans are powered by smaller, more efficient engines.

Regardless of power, the Omega could arrive at dealerships by the end of 2013.

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Correct me if I'm wrong, but isn't Buick supposed to be the equivalent of Opel in the States? Wouldn't the Lacrosse be a better choice for rebadging as an Omega? I think its design language would fit the Opel badge better than the Art and Science XTS.

As others have said, it just won't sell. BMW, MB and Audi own this segment in Europe. Not even Volvo, Alfa Romeo or other "near-luxury" brands have had significant success. Lexus is a different case because they don't want to sell in Europe, If they wanted they would have a range of 2 and 3 liter turbo and bi turbo diesel engines instead of the hydrids nobody cares about in Europe.
All the mainstream euro manufacturers used to have a car in this segment and nowadays they are gone or kept just for halo effect. When I was a kid Opel Omegas, Peugeot 60x, Citroens XM, AR 165, Honda Legend,... were a common sight. Nowadays there's 5er, E-class, A6. From times to times a 607 or and old AR 166
The only car in this segment GM should bring to Europe would be the Chevrolet Impala and just because they can just import it on order without any development costs.

I'd be very curious how they style this car. There is no way this is going to be a big seller, so they probably can't afford to dump a lot of money into a restyling, but at the same time, they need to make it look at least a little like the rest of the Opel lineup.
Seems as though a version of the ATS (with all unique sheetmetal) would be a better fit in Europe. Then again, I guess there is no reason we can't get both. The ATS platform will be spawning off a variety of cars (including the next-gen Camaro, and I would guess some Chevy sedan), so Opel could very well get to use that platform as well.

What on Earth are they thinking at GM? They are going down that same road again of rebadging- dilluting and confusing brand identies just as the World is getting to be a much smaller palce. Bad Bad move GM. I'll say it again, Opel is probably the strongest brand in the stable and they don't even know it.

I think someone has goofed here.
So they say the XTS would become a Opel Omega? The Same car that Cadillac knows has no place in Europe?
How about the new RWD Omega platform for the LTS being shared with Opel as a flagship in Europe. Cadillac need to share this platform but not with anyone in North America and a lower grade version would fit Opel well.
I may be wrong but this should be Omega platfrom based LTS will be used by Opel as the Omega in Europe.
Since the Omega platfrom just got the green light this anouncement would make more sense.

I think you may be onto something here. So long as the Omega (whatever it's based on) is significantly larger and distanced from the Insignia, without looking/feeling like an oversized American saloon.

What are you talking about?
Opel *IS* GM in Europe.
Without them, they would barely have a presence on the continent. Sure, they are trying to bring Cadillac as well as Chevy there, but those are tiny sales numbers right now.

Americans don't seem to understand that to Europeans, most Chevrolets are still budget models from Korea, having replaced Daewoo in the High Street. Of course, Europeans still view historic nameplates such as Corvette and Camaro as American, but not the likes of the Aveo (aka Sonic) or Cruze - those are Korean and meant to be priced below any equivalent Opel.

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You do know the XTS is a FWD/AWD trasnverse vehicle, right? CO2 based taxation will only favor diesel until everyone is on Euro6- when fuel economy takes a big dump.
If you want a RWD alternative to an S or 7, get an LS460 and never look back.